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Finding the Fourth Proportional to 620,516.51, 856,066.55 and 358,823.46

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Solution

The fourth proportional to 620,516.51, 856,066.55 and 358,823.46 is: 495,033.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,516.51 : 856,066.55 = 358,823.46 : x
  2. Step 2: Convert to fraction form
    620,516.51/856,066.55 = 358,823.46/x
  3. Step 3: Cross multiply
    620,516.51x = 856,066.55 × 358,823.46
  4. Step 4: Simplify right side
    620,516.51x = 307,176,761,461.26
  5. Step 5: Solve for x
    x = 307,176,761,461.26/620,516.51
  6. Step 6: Final answer
    x = 495,033.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.